Implementation Decentralized Space Vector PWM Method for Multilevel Multiphase Converters

Abstract

In the field of power electronics research, the expansion of the number of phases and voltage levels in power converters may pose several challenges for central processors. In the space vector pulse width modulation (SVPWM) method, the microprocessor must simultaneously calculate the multi-vector switching and the corresponding switching time based on complex computational algorithms. The complexity of the algorithm flowchart tends to increase significantly as the number of phases and voltage levels increase. This problem can be easily solved in decentralized controlled power converters. The decentralized control structure and method allow cells to divide themselves into tasks based on limited information exchange with neighboring cells. This study presents a decentralized control topology for a multilevel multiphase power converter (MMPC) using the SVPWM method. Depending on the number of active cells, each cell exchanges information with its neighbors, determining the exact switching vector and switching time. Using this approach, the requirements for computing power and processing speed of the cells are significantly reduced. Digital signal processing (DSP) TMS320F28379D is used as a controller of cells to verify the proposed structure and method in addition to simulation results using on MATLAB/Simulink software.